I picked one up last week and have been messing with it. My decision was between the 60 and the 62.
I went with the 62 basically because it is the newer model. It has a ton of memory and the one thing that I like is that it allows you to upload the and the sattelite images using BaseCamp - Whether or not you need that is up to you. I am having some fun messing with the custom maps too - uploading trail maps directly to the gps after I get them overlayed in Google Earth.
I don't have any experience with the 60, but from the research that I did - I think they are pretty equal, you won't go wrong with either one. I used my Cabela's points so I didn't feel the sting of the extra $200 bucks...
Good write up of the features -
http://gpsinformation.info/penrod/62S/62-78.html